Control device setting order condition for ordering cartridge to be mounted in recording device provided with tank

In a control device, a controller sets an order condition using a plurality of sets of timing information and a plurality of index values stored in a memory. The plurality of index values is acquired from a recording device under a condition where a first cartridge is mounted in the recording device. The order condition requires that one of a latest index value and a current timing have reached corresponding one of a reference index value and a reference timing, and is set so that a second cartridge is delivered to a predetermined destination at a first timing at which the first cartridge is expected to be out of a printing agent while a tank of the recording device is expected to still accommodate the printing agent. The controller transmits an order command instructing to order the second cartridge to a relevant device after the order condition is satisfied.